A novel and easy two-step, microwave-assisted method for the synthesis of halophenyl pyrrolo[2,3-b]quinoxalines via their pyrrolo precursors. Evaluation of their bioactivity
作者:Stella Manta、Dimitra-Niki Gkaragkouni、Eleni Kaffesaki、Petros Gkizis、Dimitra Hadjipavlou-Litina、Eleni Pontiki、Jan Balzarini、Wim Dehaen、Dimitri Komiotis
DOI:10.1016/j.tetlet.2014.01.106
日期:2014.3
A novel, two-step, facile route for the synthesis of pyrrolo[2,3-b]quinoxalines via 2,3-dioxopyrroles, enhanced by microwave irradiation, is presented. The newly synthesized 2,3-dioxo-5-halophenyl pyrrolo precursors 4a–c as well as the non-aromatized ethyl 2-(4-halophenyl)-1-methyl-2,4-dihydro-1H-pyrrolo[2,3-b]quinoxaline-3-carboxylates 6a–c and the aromatized ethyl 2-(4-halophenyl)-1-methyl-1H-pyrrolo[2
提出了一种新颖的,两步,简便的路线,该路线可通过微波辐射增强的2,3-二氧杂吡咯合成吡咯并[ 2,3- b ]喹喔啉。新合成的2,3-二氧代-5-卤代苯基吡咯烷前体4a – c以及非芳香化的乙基2-(4-卤代苯基)-1-甲基-2,4-二氢-1 H-吡咯并[2, 3- b ]喹喔啉-3-羧酸6A - ç和芳香化2-(4-卤代苯基)-1-甲基- 1 H ^ -吡咯并[2,3- b ]喹喔啉-3-羧酸7A - ç对它们的抗氧化,抑制细胞生长和抗病毒特性进行了评估。他们中的大多数被证明是有效的羟基自由基清除剂,并抑制了体外脂质过氧化。这些化合物显示出适度的抗增殖活性,而6a抑制痘苗病毒的EC 50值为2μM,4c和6c抑制辛德比斯病毒的EC 50值为4μM。